feat: implement vm

include/vm/fzl_vm.h

@@ -0,0 +1,38 @@
+#ifndef FZL_VM_H
+#define FZL_VM_H
+
+#include <compiler/utils/fzl_const_pool.h> // NOTE: move outside compiler scope to common
+#include <stddef.h>
+#include <stdint.h>
+
+// VM descriptor
+typedef struct
+{
+  fzl_const_t *consts;
+  size_t consts_count;
+
+  uint64_t *ops;
+  size_t ops_count;
+
+  size_t ip;
+
+  fzl_const_t stack[256];
+  size_t stack_top;
+
+  fzl_const_t arg_stack[256];
+  size_t arg_top;
+} fzl_vm_t;
+
+// Allocate FZL VM
+fzl_vm_t *fzl_mkvm(const char *filepath);
+
+// Load and run code
+int fzl_vm_run(fzl_vm_t *vm);
+
+// Get last VM error message
+char *fzl_vm_geterror();
+
+// Free VM
+void fzl_freevm(fzl_vm_t *vm);
+
+#endif // FZL_VM_H